Complete range of silicone sealants for construction, glazing and specialty applications
One-part neutral-cure structural and weather seal for curtain wall glazing, structural attachment of panel systems, protective glazing and panel stiffener applications. Structural, weatherproofing, construction, insulating glass, stone, firestop, anti-fungus and specialty silicone sealants for curtain walls, facades, IG units and general construction.

Structural, weatherproofing, construction, insulating glass, stone, firestop, anti-fungus and specialty silicone sealants for curtain walls, facades, IG units and general construction.
Custom specifications, packaging and volumes are available on request. Contact our sales team for samples, technical data sheets and distributor pricing.
Every product in this family is supplied to specification. Full technical data sheets, packaging options and OEM requirements are available on request.
Need a specific dimension or configuration? Tell us your requirement and we'll match the closest product in the range.
| Composition | One-part, neutral-cure RTV silicone sealant |
| Standards | ASTM C1184, Type S, Use G and O; GB 16776 |
| Colors | Black, gray, white (standard); other colors (customized) |
| Working Time | 10-20 minutes |
| Tack Free Time | 30-60 minutes (ASTM C679) |
| Curing Time | 7-14 days |
| Full Adhesion | 14-21 days |
| Flow, Sag or Slump | <0.1 mm (ASTM C639) |
| VOC Content | <30 g/L |
| Durometer Hardness, Shore A | 45 (ASTM C661) |
| Ultimate Tensile Strength | 1.10 MPa (ASTM C1135) |
| Ultimate Elongation | 260% (ASTM C1135) |
| Tear Strength, Die B | 10 kN/m (ASTM C624) |
| Peel Strength | 41 ppi (ASTM C794) |
| After QUV 5000h — Tensile at 100% elongation | 0.60 MPa (ASTM C1135) |
| After QUV 5000h — Ultimate Tensile at break | 1.10 MPa (ASTM C1135) |
| Note | Typical property data values should not be used as specifications. Contact HANWIN GLASS TECHNOLOGY for specifications assistance. |
| Package | 300 ML cartridge and 590 ML sausage |
| Storage | 12 months at ≤27°C (80°F) in original unopened containers |
Structural glazing and weatherproofing for curtain walls, facades and panel systems using one-part and two-part silicone sealants.
Secondary edge adhesive sealants for insulating glass units in factory production lines.
Weathersealing for stone curtain wall joints and epoxy adhesives for dry-fixing stone panels.
Firestop silicone sealants for flame resistance waterproof sealing in fire-rated systems.
Anti-fungus, liquid nails and epoxy grout for kitchen, bathroom, tile joints and general construction sealing.
One-stop supply of structural, weatherproofing, construction, IG, stone, firestop and specialty silicone sealants.
All products tested to ASTM, EN, ISO and GB standards for quality assurance.
Joint movement capability from ±12.5% to ±50% to accommodate building movement.
Flexible over a temperature range of -58°F (-50°C) to 302°F (150°C) when fully cured.
Everything you need to know about silicone sealant products.
One-part neutral-cure structural and weather seal for curtain wall glazing, structural attachment of panel systems, protective glazing and panel stiffener applications. Structural, weatherproofing, construction, insulating glass, stone, firestop, anti-fungus and specialty silicone sealants for curtain walls, facades, IG units and general construction.
SS521 — Silicone Structural Sealant is used for curtain wall & facade glazing, insulating glass fabrication, stone cladding & dry-fixing, fire-rated sealing, general construction. Complete range of silicone sealants for construction, glazing and specialty applications
Submit an enquiry mentioning SS521 — Silicone Structural Sealant, your quantities and delivery region. Our distribution team responds within 24 hours with pricing, samples and technical data sheets.
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Contact our distribution team for pricing, samples, technical data sheets and delivery schedules across Asia and the Middle East.